Aprilaire 60 & 62 Figure M, Humidifier does not operate in Test/Reset mode

TABLE 1

Outdoor Temperature (°F)	Resistance (kΩ) ±10
-30	231.8
-20	163.4
-10	117.3
0	84.8
10	62.2
20	46.1
30	34.4
40	26.1
50	19.9
60	15.3
70	11.9
80	9.3
90	7.3
100	5.8

Figure M

Red “Call Dealer For Service” Light

Yellow “Change Water Panel” Light

Green “Humidifier On” Light

90-1227

SYMPTOM

Humidifier does not operate in “Test/Reset” mode.

TROUBLESHOOTING PROCEDURE

•Check wiring diagrams for correct Humidifier Control installation

•Make sure that the blower is operating and the HVAC system is calling for heat.

•Check wiring diagrams for correct Humidifier Control installation.

•If connected to a Model 400 Series humidifier, make sure both floats in the bottom of the scale control insert are in the down position. If necessary, dump out water to lower the floats.

•Check voltage at the Humidifier Control “R” and “C” terminals. Voltage should be 22 VAC minimum to 30 VAC maximum.

•Make sure that the saddle valve is open.

•In “Test/Reset mode, the humidifier will operate for 1 minute only. DO NOT LEAVE THE HUMIDIFIER CONTROL IN “TEST/RESET” MODE AS THE HUMIDIFIER WILL NOT OPERATE.

22 23